TL;DR
Blackwall X402 Guardrail is a Model Context Protocol (MCP) server. Pre-signature x402 payment verdict (GO/HOLD/STOP) for AI agents, with a verifiable signed receipt. Install with: Remote MCP: https://mcp.blackwalltier.com. Source: https://github.com/bluetieroperations-create/blackwall-mcp-remote. Compatible with MCP clients such as Claude Desktop, Cursor, Cline and Windsurf.
Blackwall X402 Guardrail
Pre-signature x402 payment verdict (GO/HOLD/STOP) for AI agents, with a verifiable signed receipt.
Install Command
Remote MCP: https://mcp.blackwalltier.comFrequently Asked Questions
Blackwall X402 Guardrail is a Model Context Protocol server that Pre-signature x402 payment verdict (GO/HOLD/STOP) for AI agents, with a verifiable signed receipt.
You can install it by running the install command: `Remote MCP: https://mcp.blackwalltier.com`. It then becomes available to any MCP-compatible client such as Claude, Cursor, Cline, Windsurf.
The Blackwall X402 Guardrail MCP Server is compatible with any client that speaks the Model Context Protocol — including Claude, Cursor, Cline, Windsurf.
Check the project license on its repository before use.
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- Last Updated
- Aug 12, 2026
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Client Compatibility
Speaks the Model Context Protocol — works with any compatible client.